Linear anti-light back projection optical imaging film
By designing a linear anti-glare rear projection optical imaging film, and utilizing the combination of a substrate layer, an adhesion-promoting undercoat layer, a linear grating layer, and an imaging layer, the problems of unclear imaging and single-sided imaging of rear projection optical imaging films are solved, achieving clear imaging effects on both sides with vibrant colors.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- 中科宝溢视觉科技(江苏)有限公司
- Filing Date
- 2023-12-07
- Publication Date
- 2026-08-04
AI Technical Summary
Existing rear-projection optical imaging films cannot effectively resist the influence of ambient light, resulting in unclear imaging, and can only achieve single-sided imaging, which limits their application range.
A linear anti-glare rear projection optical imaging film is adopted, which includes a substrate layer, an adhesion promoting base layer, a linear grating layer and an imaging layer. It achieves double-sided imaging by directional refraction of the projector light source, and an anti-glare layer is added to the imaging layer to eliminate glare.
It achieves clear and vibrant colors in dual-sided imaging, reduces the impact of ambient light, and improves image quality.
Smart Images
Figure CN117518699B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of rear projection optical imaging films, and more particularly to a linear anti-glare rear projection optical imaging film. Background Technology
[0002] Rear projection optical imaging film is a thin-film optical imaging film used in projection systems. It is typically placed between the projector's light source and the projection screen, but can also be applied to glass or transparent acrylic sheets. This film has a wide range of applications, including commercial displays, education and training, home entertainment, and conference presentations.
[0003] Currently, existing rear-projection optical imaging films have several problems. First, they are generally not effective at resisting the effects of ambient light, which can lead to unclear images and poor viewing quality. This means that users cannot fully display, demonstrate, or advertise content. Second, they typically only achieve single-sided imaging and cannot achieve double-sided imaging, which limits their application range in certain scenarios. Summary of the Invention
[0004] This application aims to at least partially address one of the technical problems in the related art.
[0005] Therefore, one objective of this application is to provide a linear anti-glare rear projection optical imaging film that can not only image from both sides, but also directionally refract the light source of the projector to achieve an anti-glare effect, making the imaging effect clearer and the colors more vibrant.
[0006] To achieve the above objectives, a first aspect of this application provides a linear anti-glare rear projection optical imaging film, comprising a substrate layer, a first adhesion-promoting undercoat layer, a second adhesion-promoting undercoat layer, a linear grating layer, and an imaging layer. The substrate layer has the first adhesion-promoting undercoat layer on one side and the second adhesion-promoting undercoat layer on the other side. The linear grating layer is disposed on the first adhesion-promoting undercoat layer, and the imaging layer is disposed on the second adhesion-promoting undercoat layer. The substrate layer is used to integrally support the linear grating layer and the imaging layer through the first and second adhesion-promoting undercoat layers, and is light-transmitting. The imaging layer is used for double-sided imaging. The linear grating layer is used to directionally refract the light source of the projector to resist glare.
[0007] The linear anti-glare rear projection optical imaging film of this application embodiment can not only perform double-sided imaging, but also directionally refract the light source of the projector, thereby achieving an anti-glare effect and making the imaging effect clearer and more vibrant.
[0008] In addition, the linear anti-glare rear-projection optical imaging film proposed in this application may also have the following additional technical features:
[0009] In one embodiment of this application, the imaging layer includes a main imaging layer and an anti-glare layer, wherein the main imaging layer is disposed on the second adhesion-promoting undercoat layer for clear and vibrant imaging; the anti-glare layer is disposed on the main imaging layer for uniformly scattering the light source of the projector and eliminating glare caused by ambient light.
[0010] In one embodiment of this application, the substrate layer is an optical grade BOPET (Biaxially Oriented Polyethylene Terephthalate) substrate layer with a thickness of 100 μm.
[0011] In one embodiment of this application, both the first adhesion-promoting primer and the second adhesion-promoting primer are water-based environmentally friendly primers.
[0012] In one embodiment of this application, the linear grating layer is made of a high-transmittance optical-grade transparent material, with a transparent grayish color, and the grating cross-section angle is 45°, forming an isosceles triangle.
[0013] In one embodiment of this application, the high-transparency optical-grade transparent material contains nanometer (nanometre) level black paste, with an addition amount of 0.2%-0.5%.
[0014] In one embodiment of this application, the main imaging layer is provided with nanometer-level titanium dioxide, nanometer-level silicon dioxide, and nanometer-level black paste, and the transmittance is adjusted to 15%-25% and the haze is adjusted to 55%-70%.
[0015] In one embodiment of this application, the anti-glare layer is an optical-grade transparent material with a surface microstructure at the nm level, and its light transmittance is adjusted to 75%-85%, and its haze is adjusted to 25%-30%.
[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:
[0018] Figure 1 This is a schematic diagram illustrating the usage state of a linear anti-glare rear projection optical imaging film according to an embodiment of this application;
[0019] Figure 2 This is a schematic diagram of the structure of a linear anti-glare rear projection optical imaging film according to an embodiment of this application;
[0020] Figure 3 This is a cross-sectional structural diagram of a linear grating layer according to an embodiment of this application.
[0021] As shown in the figure: 10, substrate layer; 20, first adhesion promoting base layer; 30, second adhesion promoting base layer; 40, linear grating layer; 50, imaging layer; 51, main imaging layer; 52, anti-glare layer. Detailed Implementation
[0022] Embodiments of this application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. Rather, embodiments of this application include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.
[0023] The linear anti-glare rear projection optical imaging film of this application embodiment will now be described with reference to the accompanying drawings.
[0024] like Figures 1-3 As shown, the linear anti-glare rear projection optical imaging film of this application embodiment may include a substrate layer 10, a first adhesion promoting undercoat 20, a second adhesion promoting undercoat 30, a linear grating layer 40, and an imaging layer 50.
[0025] The substrate layer 10 has a first adhesion-promoting undercoat layer 20 on one side and a second adhesion-promoting undercoat layer 30 on the other side. The linear grating layer 40 is disposed on the first adhesion-promoting undercoat layer 20, and the imaging layer 50 is disposed on the second adhesion-promoting undercoat layer 30.
[0026] In this application example, the substrate layer 10 can be an optical-grade BOPET substrate layer with a thickness of 100 μm. It should be noted that the BOPET described in this embodiment, as a substrate, has good strength and flatness. Since the projection film has high requirements for flatness, BOPET is chosen as the substrate. Considering the tension on the projection film during subsequent screen installation, a thickness of 100 micrometers is chosen to prevent deformation of the film after being subjected to tension. Furthermore, the rear projection film also has high requirements for light transmittance and haze; therefore, high-transmittance optical-grade BOPET is chosen as the substrate layer.
[0027] The substrate layer 10 is used to integrate the linear grating layer 40 and the imaging layer 50 by means of the first adhesion promoting base layer 20 and the second adhesion promoting base layer 30, and is light-transmitting.
[0028] In this application example, both the first adhesion-promoting primer 20 and the second adhesion-promoting primer 30 can be water-based environmentally friendly primers. The first adhesion-promoting primer 20 and the second adhesion-promoting primer 30 enable the layers to form an integrated effect, and the layers cannot be peeled off.
[0029] Imaging layer 50 is used for double-sided imaging. Linear grating layer 40 is used to directionally refract the light source of the projector to achieve anti-glare effect and assist imaging layer 50 in double-sided imaging, making the image clearer and the colors more vibrant. It should be noted that the linear structure of linear grating layer 40 described in this embodiment has no viewing angle limitation.
[0030] It should be noted that the linear grating layer 40 described in this embodiment is a thin film or sheet with a grating structure. It can change the propagation direction and distribution of light to achieve effects such as diffraction, beam splitting, reflection, and polarization. In a projection system, the linear grating layer can be placed behind the rear projection optical imaging film projected by the projector's light source or on the side of the projection screen. By directionally refracting the light emitted by the light source, it disperses the light in different directions, reducing the concentration of light in a certain direction, thereby reducing problems such as glare and reflection. In addition, it can also scatter light over a wider angular range through diffraction and scattering, improving the viewing angle and visible range of the projected image.
[0031] Specifically, when a linear anti-glare rear projection optical imaging film is required, the operator can coat a first adhesion-promoting undercoat 20 onto one side of the substrate layer 10, and then coat the linear grating layer 40 onto the first adhesion-promoting undercoat 20. Next, a second adhesion-promoting undercoat is coated onto the other side of the substrate layer 10, and finally the imaging layer 50 is coated onto the second adhesion-promoting undercoat, thereby forming a linear anti-glare rear projection optical imaging film.
[0032] When using linear anti-glare rear projection optical imaging film, such as Figure 1As shown, by placing the projection device behind the linear anti-glare rear projection optical imaging film, i.e., with the projection device facing the imaging layer 50, the audience can view it from the front or the back. Ambient light generally exists directly above or diagonally above. For example, ambient light can be sunlight and / or lamplight. Therefore, when ambient light shines down diagonally above the rear projection screen, it will be reflected by the linear grating layer 40, thus preventing the ambient light from reaching the imaging layer 50 below the linear grating layer 40. Even if a very small portion mixes with the light source of the projection device and reaches the imaging layer 50, it will not be affected. The light source of the projection device is projected from a position parallel to the center line of the screen towards the inside of the grating. This portion of the light source is refracted multiple times within the linear grating layer 40. Part of it passes through the grating and forms an image on the back; the other part is oriented by the angle of the grating and forms an image on the front. Therefore, there will be no light bands or light spots on the back.
[0033] The light scattered back from the front is evenly distributed by the imaging layer 50, preventing light bands and spots, thus achieving an anti-glare effect. This results in uniform imaging on both sides and excellent color reproduction. Compared to existing rear projection screens, when using this linear anti-glare rear projection optical imaging film, users can maintain high image clarity, brightness, and contrast on both sides even with the lights on. In actual use, users can also adjust the position of the screen and the projection device to achieve the best imaging effect.
[0034] In one embodiment of this application, such as Figure 1 and Figure 2 As shown, the imaging layer 50 may include a main imaging layer 51 and an anti-glare layer 52.
[0035] The main imaging layer 51 is disposed on the second adhesion-promoting undercoat 30 for clear and vibrant imaging.
[0036] In this embodiment, the main imaging layer 51 contains nanometer-level titanium dioxide, nanometer-level silicon dioxide, and nanometer-level black paste, and the transmittance can be adjusted to 15%-25%, and the haze can be adjusted to 55%-70%.
[0037] It should be noted that the amounts of nm-level titanium dioxide, nm-level silica, and nm-level black paste described in this embodiment can be selected according to actual conditions and are not limited here. The specific addition standard is to meet the requirements of light transmittance and haze. Furthermore, by adjusting the filler ratio, light transmittance and haze will change, and the ratio of light transmittance and haze that meets the requirements can be adaptively selected; the ratio is not unique. It is sufficient to meet the requirements of light transmittance and haze.
[0038] An anti-glare layer 52 is disposed on the main imaging layer 51 to uniformly scatter the light source of the projector and eliminate glare caused by ambient light.
[0039] In this embodiment, the anti-glare layer 52 can be an optical-grade transparent material with a surface having a nanometer-level microstructure, and the light transmittance can be adjusted to 75%-85%, and the haze can be adjusted to 25%-30%.
[0040] It should be noted that the nm-level microstructures described in this embodiment refer to surface microstructures with a structural depth at the nm level. The structure of this layer is not unique, as long as it meets the requirements for light transmittance and haze.
[0041] In one embodiment of this application, such as Figure 3 As shown, the linear grating layer 40 can be made of a high-transmittance optical-grade transparent material, with a transparent grayish color, and the grating section angle is 45°, forming an isosceles triangle.
[0042] It should be noted that the grating profile angle of the linear grating layer 40 described in this embodiment is applicable to medium and long focal length cameras.
[0043] In the embodiments of this application, a nanometer-level black paste is added to the high-transparency optical-grade transparent material, and the amount added can be 0.2%-0.5%.
[0044] It is understandable that by adjusting the grating angle, light can be refracted in a specific direction, thereby changing the direction and distribution of light propagation. This allows for effects such as diffraction, beam splitting, reflection, and polarization, thus reducing glare and reflection. Furthermore, adding colorant can impart a specific color. The amount of colorant added can be selected based on the actual situation and is not limited here; however, a light gray color is optimal.
[0045] Specifically, when using linear anti-glare back-projection optical imaging films, such as Figure 1 As shown, by placing the projection device behind the linear anti-glare rear projection optical imaging film, i.e., with the projection device facing the anti-glare layer 52, the audience can view the film from the front or back. Ambient light generally exists directly above or diagonally above, consisting of sunlight and / or artificial light. Therefore, when ambient light shines down from directly above or diagonally above the rear projection screen, it is reflected by the linear grating layer 40, preventing it from reaching the imaging layer 50 below the linear grating layer 40. Even if a very small portion mixes with the light source of the projection device and reaches the main imaging layer 51, the main imaging layer 51 remains unaffected.
[0046] The light source of the projection device is projected from a position parallel to the center line of the screen onto the inside of the grating. This part of the light source is refracted multiple times within the linear grating layer 40. Part of it passes through the grating and forms an image on the back, while the other part is oriented and formed on the front by adjusting the angle of the grating. Therefore, there will be no light bands or light spots on the back.
[0047] The light scattered back from the front is uniformly distributed due to the presence of the anti-glare layer 52, preventing light bands and spots, thus achieving an anti-glare effect. This results in uniform imaging on both sides and excellent color reproduction.
[0048] In summary, the linear anti-glare rear projection optical imaging film of this application embodiment not only enables double-sided imaging, but also directional refraction of the projector's light source, achieving an anti-glare effect and making the imaging effect clearer and more vibrant.
[0049] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0051] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A linear anti-light back-projection optical imaging film, characterized in that, It includes a substrate layer, a first adhesion-promoting primer layer, a second adhesion-promoting primer layer, a linear grating layer, and an imaging layer, wherein, The substrate layer has a first adhesion-promoting undercoat layer on one side and a second adhesion-promoting undercoat layer on the other side. The linear grating layer is disposed on the first adhesion-promoting undercoat layer, and the imaging layer is disposed on the second adhesion-promoting undercoat layer. The substrate layer is used to integrate the linear grating layer and the imaging layer through the first adhesion-promoting undercoat and the second adhesion-promoting undercoat, and is light-transmitting; The imaging layer is used for double-sided imaging; The linear grating layer is used to directionally refract the light source of the projector to resist light. The linear grating layer is located behind the rear projection optical imaging film on which the light source of the projector is projected. The light source is refracted multiple times in the linear grating layer. Part of it passes through the grating and is imaged on the back, while part of it is directionally adjusted by the angle of the grating and is imaged on the front. The imaging layer includes a main imaging layer and an anti-glare layer, wherein the main imaging layer is disposed on the second adhesion-promoting undercoat layer for clear and vibrant imaging. The anti-glare layer is disposed on the main imaging layer and is used to uniformly scatter the light source of the projector and eliminate glare caused by ambient light.
2. The linear optically-reflective back-pouring optical imaging film according to claim 1, wherein, The substrate layer is an optical-grade BOPET substrate layer with a thickness of 100μm.
3. The linear anti-glare rear-projection optical imaging film according to claim 1, characterized in that, Both the first adhesion-promoting primer and the second adhesion-promoting primer are water-based environmentally friendly primers.
4. The linear anti-glare rear-projection optical imaging film according to claim 1, characterized in that, The linear grating layer is made of a high-transmittance optical-grade transparent material, with a transparent grayish color and a grating cross-sectional angle of 45°, forming an isosceles triangle.
5. The linear anti-glare rear-projection optical imaging film according to claim 4, characterized in that, The high-transparency optical-grade transparent material contains nanometer-level black paste, with an addition amount of 0.2%-0.5%.
6. The linear anti-glare rear-projection optical imaging film according to claim 1, characterized in that, The main imaging layer contains nanometer-level titanium dioxide, nanometer-level silicon dioxide, and nanometer-level black paste, and the light transmittance is adjusted to 15%-25%, and the haze is adjusted to 55%-70%.
7. The linear anti-glare rear-projection optical imaging film according to claim 2, characterized in that, The anti-glare layer is made of optical-grade transparent material with a nanometer-level microstructure on its surface. The light transmittance is adjusted to 75%-85%, and the haze is adjusted to 25%-30%.